Exploring Electron Shells and Valence Electrons

What is the dense core of an atom called?

• Nucleus

• Electron

• Proton

• Neutron

Which particle in an atom has a negative charge?

• Proton

• Neutron

• Electron

• Nucleus

What is the closest shell to the nucleus called?

• N shell

• K shell

• M shell

• L shell

How many electrons can the first shell hold?

• 2

• 6

• 8

• 4

Which group in the periodic table has elements with 2 electrons in the outer shell?

• Group 18

• Group 13

• Group 2

• Group 1

How many energy shells does hydrogen have?

• 1

• 4

• 2

• 3

Tags

NGSS.MS-PS1-1

Which element in Period 2 has three valence electrons?

• Oxygen

• Carbon

• Boron

• Nitrogen

How many valence electrons does neon have?

• 6

• 7

• 8

• 9

Which element in Period 3 has one valence electron in the M shell?

• Magnesium

• Aluminium

• Silicon

• Sodium

How many valence electrons does sulfur have in the M shell?

• 7

• 6

• 5

• 4